Pairing symmetries in the Zeeman-coupled extended attractive Hubbard model

Abstract By introducing the possibility of equal- and opposite-spin pairings concurrently, we show that the ground state of the extended attractive Hubbard model (EAHM) exhibits rich phase diagrams with a variety of singlet, triplet, and mixed parity superconducting orders. We study the competition...

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Autores principales:	Swagatam Nayak, Navketan Batra, Sanjeev Kumar
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/518b3fad56e04e0881cd6a2371cac747
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spelling	oai:doaj.org-article:518b3fad56e04e0881cd6a2371cac7472021-11-28T12:21:51ZPairing symmetries in the Zeeman-coupled extended attractive Hubbard model10.1038/s41598-021-02175-52045-2322https://doaj.org/article/518b3fad56e04e0881cd6a2371cac7472021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-02175-5https://doaj.org/toc/2045-2322Abstract By introducing the possibility of equal- and opposite-spin pairings concurrently, we show that the ground state of the extended attractive Hubbard model (EAHM) exhibits rich phase diagrams with a variety of singlet, triplet, and mixed parity superconducting orders. We study the competition between these superconducting pairing symmetries invoking an unrestricted Hartree–Fock–Bogoliubov–de Gennes (HFBdG) mean-field approach, and we use the d-vector formalism to characterize the nature of the stabilized superconducting orders. We discover that, while all other types of orders are suppressed, a non-unitary triplet order dominates the phase space in the presence of an in-plane external magnetic field. We also find a transition between a non-unitary to unitary superconducting phase driven by the change in average electron density. Our results serve as a reference for identifying and understanding the nature of superconductivity based on the symmetries of the pairing correlations. The results further highlight that EAHM is a suitable effective model for describing most of the pairing symmetries discovered in different materials.Swagatam NayakNavketan BatraSanjeev KumarNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-17 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Swagatam Nayak Navketan Batra Sanjeev Kumar Pairing symmetries in the Zeeman-coupled extended attractive Hubbard model
description	Abstract By introducing the possibility of equal- and opposite-spin pairings concurrently, we show that the ground state of the extended attractive Hubbard model (EAHM) exhibits rich phase diagrams with a variety of singlet, triplet, and mixed parity superconducting orders. We study the competition between these superconducting pairing symmetries invoking an unrestricted Hartree–Fock–Bogoliubov–de Gennes (HFBdG) mean-field approach, and we use the d-vector formalism to characterize the nature of the stabilized superconducting orders. We discover that, while all other types of orders are suppressed, a non-unitary triplet order dominates the phase space in the presence of an in-plane external magnetic field. We also find a transition between a non-unitary to unitary superconducting phase driven by the change in average electron density. Our results serve as a reference for identifying and understanding the nature of superconductivity based on the symmetries of the pairing correlations. The results further highlight that EAHM is a suitable effective model for describing most of the pairing symmetries discovered in different materials.
format	article
author	Swagatam Nayak Navketan Batra Sanjeev Kumar
author_facet	Swagatam Nayak Navketan Batra Sanjeev Kumar
author_sort	Swagatam Nayak
title	Pairing symmetries in the Zeeman-coupled extended attractive Hubbard model
title_short	Pairing symmetries in the Zeeman-coupled extended attractive Hubbard model
title_full	Pairing symmetries in the Zeeman-coupled extended attractive Hubbard model
title_fullStr	Pairing symmetries in the Zeeman-coupled extended attractive Hubbard model
title_full_unstemmed	Pairing symmetries in the Zeeman-coupled extended attractive Hubbard model
title_sort	pairing symmetries in the zeeman-coupled extended attractive hubbard model
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/518b3fad56e04e0881cd6a2371cac747
work_keys_str_mv	AT swagatamnayak pairingsymmetriesinthezeemancoupledextendedattractivehubbardmodel AT navketanbatra pairingsymmetriesinthezeemancoupledextendedattractivehubbardmodel AT sanjeevkumar pairingsymmetriesinthezeemancoupledextendedattractivehubbardmodel
_version_	1718408012050202624

Pairing symmetries in the Zeeman-coupled extended attractive Hubbard model

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